CN1506960A - Manishaft motor for driving aptical disk - Google Patents

Manishaft motor for driving aptical disk Download PDF

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Publication number
CN1506960A
CN1506960A CNA031106595A CN03110659A CN1506960A CN 1506960 A CN1506960 A CN 1506960A CN A031106595 A CNA031106595 A CN A031106595A CN 03110659 A CN03110659 A CN 03110659A CN 1506960 A CN1506960 A CN 1506960A
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CN
China
Prior art keywords
spindle motor
rotor
horizontal component
axle
disk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CNA031106595A
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Chinese (zh)
Inventor
李七星
金泰宪
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Samsung Electro Mechanics Co Ltd
Original Assignee
Samsung Electro Mechanics Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Samsung Electro Mechanics Co Ltd filed Critical Samsung Electro Mechanics Co Ltd
Publication of CN1506960A publication Critical patent/CN1506960A/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B19/00—Driving, starting, stopping record carriers not specifically of filamentary or web form, or of supports therefor; Control thereof; Control of operating function ; Driving both disc and head
    • G11B19/20—Driving; Starting; Stopping; Control thereof
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/022—Positioning or locking of single discs
    • G11B17/028—Positioning or locking of single discs of discs rotating during transducing operation
    • G11B17/0282—Positioning or locking of single discs of discs rotating during transducing operation by means provided on the turntable
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B17/00—Guiding record carriers not specifically of filamentary or web form, or of supports therefor
    • G11B17/02—Details
    • G11B17/038—Centering or locking of a plurality of discs in a single cartridge
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B25/00—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus
    • G11B25/04—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card
    • G11B25/043—Apparatus characterised by the shape of record carrier employed but not specific to the method of recording or reproducing, e.g. dictating apparatus; Combinations of such apparatus using flat record carriers, e.g. disc, card using rotating discs

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  • Rotational Drive Of Disk (AREA)
  • Holding Or Fastening Of Disk On Rotational Shaft (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
  • Motor Or Generator Frames (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)
  • Permanent Field Magnets Of Synchronous Machinery (AREA)

Abstract

Disclosed is a spindle motor adopted to a disk player. The spindle motor includes: a deck plate; a pivot mounted on the deck plate, for being rotatable; a rotor of a cap shape, joined to an outer peripheral surface of an upper side of the pivot and having tracks formed in different heights on an upper portion, and on an inner peripheral surface of which a magnet is mounted; a pulling magnet provided to a lower portion of the rotor, for generating attractive force pulling the rotor to the lower portion; a stator including a metal bearing positioned on a lower portion of the rotor and mounted on an outer peripheral surface of the pivot, a holder provided to an outer peripheral surface of the metal bearing, and a core wired by a coil provided to an outer peripheral surface of the holder; and a turntable including a disk chuck fixed on an upper surface of the rotor, for centering and settling a disk, and a jaw installed on the disk chuck, for fixing a settled disk. The pulling magnet is mounted downward on the housing in the upper end of the stator in a subsiding manner, so that the whole height of the spindle motor could be reduced as much as the downward depth of the pulling magnet. Also, the turntable is mounted downward on the track of the rotor in a subsiding manner, so that the whole height of the spindle motor is reduced ever more.

Description

Be used to drive the Spindle Motor of CD
Technical field
The present invention relates to the small-sized Spindle Motor of employing in the disk player (disk player), specifically, the height that relates to by reducing motor has the more Spindle Motor of compact structure.
Background technology
In general, CD and magnetic recording tape and LP (long-play record) have highdensity record and reproduction by comparison, and its advantage is to realize the storage of semipermanent ground.So use the disk player of CD to obtain using widely very much now.
Existing this disk player comprises laser disk player, compact disc player, and DVD (digital versatile dish) player.Specifically, in these Disc players, small-sized is used widely with portable compact disc player.Yet, recently, use to have identical size, but the DVD player of the much bigger DVD disc of memory space has obtained popularization promptly with compact disc.
The size of this type disk player, height and weight all are minimized, so the user can carry them easily, and, in the future, estimate to have only the high flat type of 9.5mm (slim type) disk player will become main flow.
A most important element of this disk player is to be used for driving disk, so that disc high speed rotating and the Spindle Motor that do not vibrate.In order to obtain small-sized disk player, Spindle Motor is wanted miniaturization too.
Certainly, size decreases that let it be to the greatest extent, this small-sized Spindle Motor should demonstrate performance at a high speed under the electric current of minimum, prevent that disc breaks away from when high-speed driving, and is minimized in the vibration that produces when driving.
Fig. 1 is the side cross-sectional, view that is used for the conventional Spindle Motor of driving disk.As shown in fig. 1, conventional Spindle Motor comprises cover plate (deck plate) 1, and its upper side is equipped with printed circuit board (PCB), and it is fixed on the disk player that does not have among the figure to show; With vertical being installed on the cover plate 1, rotatable axle (pivot) 10.
At this moment, a thrust bearing 11 that is used to prevent to take place friction between axle and cover plate is arranged in the lower end of axle 10, and also have one to be used to prevent the brake hoop 12 that moves upward under the action of centrifugal force that axle 10 produces in the lower end of axle 10 in high-speed rotation.
Conventional Spindle Motor also comprises the outside surface that is positioned at axle 10, and the cylindrical metal bearing 22 that stands vertically of supporting axis, cylindrical fixator (holder) 24 and the stator of outside surface top that be positioned at metal bearing 22, stator comprises the iron core 28 that is used for producing by power input magnetic force that is twining coil 26.
Simultaneously, be useful on the coating 28a of protection coil 26 and iron core 28 in the upper end of iron core 28.The most frequently used material of this coating 28a is an epoxy resin.
In addition, conventional Spindle Motor also comprises the shape for hat metallic rotator 40 of the upper end that is connected to axle 10, it is positioned at the top of stator 20, and, because axle 10 is to be press-fitted with inside surface from the outstanding cylindrical bosses of the core of rotor 40 (boss) 42, so 40 axles 10 of rotor are combined into one.
In addition, conventional Spindle Motor also comprises the magnet 45 of the inside surface that is placed in rotor 40, and it is relative with the iron core 28 of stator 20, and leaves air gap between them; The drawing magnetism (pulling magnet) 30 that contacts with top with stator 20, the magnetic force that it is used for passing through to be produced draws rotor 40.
Certainly, drawing magnetism 30 should keep certain clearance (g) with the lower end of rotor, to prevent with rotor 40 friction interference taking place.
Simultaneously, the rotating disk 50 that is used to lay disc (D) be placed on rotor 40 above, combine securely with rotor 40, rotating disk 50 comprises: be used for placing between two parties disc (D), thereby disc (D) accurately can be placed in dish card (disk chuck) 52 on the rotating disk 50, with sliding type mobile disc (D) on dish card 52, and be fixedly placed in the clip (jaw) 54 of the disc (D) on the dish card 52 and support the dish seat (disk sheet) 56 of the disc of being laid (D) below.
At this moment, clip 54 and spring 54a be together among the side of insertion dish card 52, and dish seat 56 forms a flange that stretches out from the below of dish card, and be combined into one with dish card 52.
Here, with at length introduce rotating disk 50 and rotor 40 in conjunction with fixation procedure.Dish card 52 has sleeve pipe (hub) 52a of a band center pit, and the sleeve pipe 52a of dish card 52 is positioned on the wheel hub 42 of rotor 40, by from the platen card 52 that faces down, the inside surface of wheel hub 42 with sleeve pipe 52a is press-fitted then.
Certainly, for the wheel hub 42 of rotor 40 and the sleeve pipe 52a of dish card 52 are press fit over together, must accomplish to allow the internal diameter of sleeve pipe 52a consistent by Precision Machining with the external diameter of wheel hub 42, and, because the internal diameter of sleeve pipe 52a is the same with the external diameter of wheel hub 42, so dish card 52 is press fitted on the rotor 40.
At this moment, in order to allow the dish card that is press-fitted 52 and rotor firmly fix more together, coated with adhesive (B) just is press-fitted dish card 52 and arrives on the wheel hub 42 of rotor 40 afterwards on the outside surface of the wheel hub 42 of rotor 40.
The conventional Spindle Motor that is used for the said structure of driving disk is worked as follows, wherein, the dish card 52 of rotating disk 50 passes through the through hole at disc (D) center to its location placed in the middle, and fix it, clip 54 is through being positioned at the through hole at disc (D) center, slide into the inside of the side of dish card 52, up to fixing, then, after finish location placed in the middle, under the elastic force effect of spring 54a, clip 54 skids off dish card 52 outsides again, and disc (D) is fixed in the inboard of the through hole by pushing disc (D).
If disc (D) has fixed, just to coil 26 energising of stator 20, thereby on iron core 28, produce magnetic force, this makes the magnetic interaction of magnetic force and magnet 45 of iron core 28.
Then, under the interaction of the magnetic force that is produced, the rotation of rotor 40 and axle 10 1 superhigh speeds.
At this moment, by the metal bearing 22 that is positioned over outside surface, axle 10 can be reposefully and high speed rotating vertically, and can not produce vibration, and by being positioned over the brake hoop 12 of axle 10 lower ends, even axle 10 rotates at high speed, it can upwards not rise yet.
That is to say that metal bearing 22 is from outside surface back shaft 10 high-speed rotation, and brake hoop 12 stops axle 10 upwards to rise under the action of centrifugal force that produces because of high speed rotating.
Simultaneously, with the rise that also can make progress under the action of centrifugal force that produces because of high speed rotating of the rotor 40 of axle 10 high-speed rotation, but the suction of drawing magnetism 30 has stoped its upwards to rise.
In addition, because the rotation of rotor 40, the rotating disk 50 that is placed on the upper surface of rotor 40 also rotates thereupon, and be placed in disc (D) on the rotating disk 50 also with rotating disk 50 high-speed rotation, therefore, there is not the disk player that shows can be among the figure at short notice at disc (D) identifying recording layer, or the data of reproducing recorded.
Certainly, because the clip 54 of rotating disk 50 firmly fixes disc (D), so even it rotates with very high speed, can upwards not rise or break away from rotating disk 50 yet, in addition, because the dish folder (disk clamp) that does not have among the figure to show is pushed down disc (D) from above, it can upwards not rise or break away from yet.
Yet the above-mentioned conventional Spindle Motor that is used for driving disk has such problem: for the drawing magnetism on the coating 28a that is positioned over iron core 28 30, after coating 28a was aging, drawing magnetism will float.
Equally, because drawing magnetism 30 is positioned at the upper end of iron core 28, protrude from the top of stator 20, this makes that the height of stator 20 is higher, having on the surface of iron core 28 under the situation of coating 28a, the height of stator 20 will further increase the height that is equivalent to coating 28a.
Certainly,, can remove the coating 28a of the position that drawing magnetism 30 placed in order to minimize the height of stator 20, even but remove coating 28a, how many height of stator 20 do not reduce yet, and to remove coating 28a also be very complicated.In addition, it also is very difficult removing hard coating 28a.
Equally, here also there is such problem: in order to support outstanding drawing magnetism 30 securely, the height of fixator 24 need prolong the amount identical with the height of drawing magnetism 30, thus the drawing magnetism 30 of the outside surface of upper end that has enough areas to hold to be positioned at iron core 28a and fixator 24.
In addition, under the situation about increasing because of the elongation of the vertical height of drawing magnetism 30 and fixator 24 at the height of stator 20, owing to will below rotor 40, leave gap (g), the problem that this has just brought the whole height (H1) of Spindle Motor also to increase.
Equally, when the sleeve pipe 52a of dish card 52 is assembled in the wheel hub 42 of rotor 40, be coated in bonding agent (B) on the wheel hub 42 and all be extruded into the lower end of wheel hub 42, and flock together in the upper end of rotor 40, because the reason of the bonding agent (B) of these gatherings, the thickness that the rotating disk 50 that rotor contacted has just floated bonding agent (B) is so high, thereby makes that the whole height (H1) of Spindle Motor is higher.
At last, because bonding agent (B) flocks together, the bond area of dish card has just reduced, and bounding force has just died down, thereby makes rotating disk 50 may break away from rotor 40 in high-speed rotation.
Summary of the invention
Therefore, in order to address the above problem, target of the present invention just provides a kind of Spindle Motor that is used for driving disk, this motor whole height can be accomplished to minimize, simultaneously by on rotor, doing the performance that a staged grooved rail (stepped track) keeps rotor and drawing magnetism, and do an inside shell in the upper end of stator, so rotating disk and drawing magnetism can be placed on rotor and the stator with sinking.
By providing a kind of Spindle Motor that uses in disk player to realize above-mentioned and other target and advantage, the Spindle Motor that is used for driving disk among the present invention comprises: cover plate; Be positioned on the cover plate rotating axle; The shape for hat rotor, it is connected to the outside surface of axle upper end, and the surface is placed with magnet within it; Drawing magnetism, it is positioned at the below of rotor, and produces the attractive force of traction rotor downwards; Stator, it comprises and is positioned at rotor below, and be positioned over the outside surface of axle metal bearing, be positioned at the fixator of outside surface of metal bearing with relative with the magnet of rotor, and between them, leave air gap, twining the iron core of coil, wherein be used to hold the upper end of the shell of drawing magnetism at stator; And rotating disk, it comprises on the upper surface that is fixed in rotor, is used for the dish card of placed in the middle and placement disc and is installed in Pan Kashang, is used for fixing disc, to prevent to be placed on the clip that the disc on the dish card breaks away from.
Also by providing a kind of Spindle Motor that uses in disk player to realize above-mentioned and other target and advantage, Spindle Motor comprises: cover plate in the present invention; Be positioned on the cover plate rotating axle; The shape for hat rotor, it is connected to the outside surface of axle upper end, the grooved rail that forms with different height is arranged in the top, and the surface is placed with magnet within it; Drawing magnetism, it is positioned at the below of rotor, and produces the attractive force of traction rotor downwards; Stator, it comprises and is positioned at rotor below, and be positioned over the outside surface of axle metal bearing, be positioned at the fixator of outside surface of metal bearing with relative with the magnet of rotor, and between them, leave air gap, twining the iron core of coil, wherein be used to hold the upper end of the shell of drawing magnetism at stator; And rotating disk, it comprises on the upper surface that is fixed in rotor, is used for placed in the middle and places the dish card of disc and be installed in Pan Kashang, is used for fixing the clip of the disc of being placed and the dish seat of the disc placed in the supported underneath of rotating disk.
Description of drawings
By following detailed, and in conjunction with the accompanying drawings, can more clearly understand above-mentioned target of the present invention, function and advantage, wherein:
Fig. 1 is the side cross-sectional, view of structure that is used for the conventional Spindle Motor of driving disk;
Fig. 2 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the first embodiment of the present invention;
Fig. 3 is the skeleton view that is used for the rotor that Spindle Motor adopted of driving disk in the second embodiment of the present invention;
Fig. 4 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the second embodiment of the present invention;
Fig. 5 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the third embodiment of the present invention;
Fig. 6 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the fourth embodiment of the present invention;
Fig. 7 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the fifth embodiment of the present invention; With
Fig. 8 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the sixth embodiment of the present invention.
Embodiment
Now, the preferred embodiment of the Spindle Motor that is used for driving disk among the present invention will be described with reference to the accompanying drawings in detail.In the following description, identical sequence number is used to represent and the components identical of using in the prior art.
Fig. 2 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the first embodiment of the present invention.The Spindle Motor that is used for driving disk among the present invention comprises: cover plate 1, and its upper surface is equipped with printed circuit board (PCB), and it is fixed on the disk player that does not have among the figure to show; Vertically be installed in cover plate 1, rotatable axle 100, a thrust bearing 11 that is used to prevent to take place friction between axle and cover plate is arranged in the lower end of axle 100, and also be connected with the brake hoop 12 of a grommet-type in the lower end of axle 100, an end of brake hoop 12 is fixed on the thrust bearing 11.
Certainly, the effect of brake hoop 12 is lower ends of holding axle 100, and to stop under the action of centrifugal force that produces when axle 100 high-speed rotation, axle 100 upwards rises.
Equally, the present invention also comprises the rotor 40 of shape for hat, and a columniform wheel hub 42 is arranged in its centre, and axle 100 upper end is fixed in 42 inside surface of wheel hub in the mode that is press-fitted, and is placed with magnet 45 at the inside surface of rotor 40.
In addition, a stator 200 is arranged below rotor 40, be used to produce with the magnet 45 interactional magnetic force of rotor 40, rotor 40 rotates under the effect of the magnetic force that stator 200 produces.
More particularly, stator 200 is placed on the lower end of axle 100, is positioned at the below of rotor 40, and stator 200 comprises: cylindrical metal bearing 220, and it is positioned at the outside surface of axle 100 bottoms, is used for back shaft 100, thereby allows axle 100 vertically erect; Cylindrical fixator 240, it is positioned at the outside surface of metal bearing 220; And the iron core 280 that is twining coil 260, it is fixed in the outside surface of fixator 240, and produces magnetic force by power input.
At this moment, be coated with the coating 280a that is useful on protective wire circle 260 and iron core 280 on the surface of iron core 280, iron core 280 is placed in the face of magnet 45, and leaves air gap between them, so iron core can be reposefully interacts with the magnet 45 of rotor 40.
Simultaneously, the shell 500 with grooving 510 that part cuts is formed on the upper end of fixator 240, and the present invention also comprises the drawing magnetism 300 that is inserted in this shell 500, be used for below attract metallic rotator 40.
More particularly, the depth ratio of the grooving 510 on the shell 500 is positioned at the upper end of the iron core 280 on the outside surface of fixator 240 and also wants dark, and therefore when placing drawing magnetism 300, the Area of bearing that is used for supporting traction magnet 300 has just enlarged.
That is to say that as shown in Figure 2, because that the inside surface of the upper end of the depth ratio iron core 280 of grooving 510 is also wanted is dark, so the lower end of drawing magnetism 300 supported by fixator 240, and the both sides of drawing magnetism 300 are supported by fixator 240 and iron core 280 respectively.
At last, the present invention also comprises: be positioned at the upper end of rotor 40, be fixed together with rotor 40, be used to place the rotating disk 50 of disc (D).
These rotating disk 50 centering discs, so disc (D) can be placed on the exact position on the rotating disk, rotating disk comprises: dish card 52, and there is a sleeve pipe 52a with holes at its center; Clip 54, it blocks mobile disc (D) on 52 with sliding type at dish, and is fixedly placed in the disc (D) on the dish card 52; And dish seat 56, it is used for the disc (D) placed from following support.
Certainly, clip 54 is inserted into the inside of the side of dish card 52 with spring 54a, and dish seat 56 stretches out below dish card 52, is combined into one with dish card 52.
That is to say that dish seat 56 is formed an outside flange in the lower end of dish card 52, therefore, dish seat 56 can form one with dish card 52 packing rings that separate.
As mentioned above, by holding drawing magnetism 300 in the shell 500 of fixator 240, and do not allow drawing magnetism contact with the upper surface of iron core 280, the height of stator 300 that is used for the Spindle Motor of driving disk in the first embodiment of the present invention can drop to minimum.
In addition, because drawing magnetism 300 is contained among the fixator 240, as shown in Figure 2, the vertical height of fixator 240 also just can reduce, and because the vertical height of fixator 240 has reduced, therefore the height of metal bearing 220 and axle 100 also just can reduce, thereby may make the height of stator 200 become littler.
Equally, the lower end of fixator 240 and Ge Bian are supporting drawing magnetism 300, so drawing magnetism 300 is securely fixed on the stator 200, and have prevented that drawing magnetism breaks away from stator.
In addition, compared with prior art, by minimizing the height of stator 200, keep the identical gap (g) below correlation technique rotor 40 simultaneously, the present invention can reduce the whole height H2 of Spindle Motor significantly.
Certainly, by reducing the whole height of Spindle Motor, the present invention can minimize the height H 2 of the disk player that does not have demonstration among the figure, thereby may produce the disk player of flat type.
At last, because drawing magnetism 300 is placed on the upper end of fixator 240, so just do not need to have removed the coating 280a on the iron core 280, therefore just can shorten manufacture process, and because drawing magnetism 300 is not placed on the coating 280a, this just prevents drawing magnetism 300 because the former thereby phenomenon that float of coating 280a occurs.
The Spindle Motor that is used for driving disk in the first embodiment of the present invention is worked as follows: wherein, the dish card 52 of rotating disk 50 passes through the through hole at disc (D) center to its location placed in the middle, and fix it, when clip 54 is positioned at the through hole at disc (D) center in process, slide into the inside of the side of dish card 52, up to fixing, then, after finish location placed in the middle, under the elastic force effect of spring 54a, clip 54 skids off dish card 52 outsides again, and disc (D) is fixed in the inboard of the through hole by pushing disc (D).
If disc (D) has fixed, just to coil 260 energising of stator 200, thereby on iron core 280, produce magnetic force, this makes the magnetic interaction of magnetic force and magnet 45 of iron core 280.
Then, under the interaction of the magnetic force that iron core 280 and magnet 45 are produced, the rotation together of rotor 400 and axle 100.
At this moment, by the metal bearing 220 that is positioned over outside surface, axle 100 can be reposefully and high speed rotating vertically, and can not produce vibration, and the brake hoop 12 by being positioned over the lower end, even axle 100 rotates at high speed, it can upwards not rise yet.
Simultaneously, with the rise that also can make progress under the action of centrifugal force that produces because of high speed rotating of the rotor 40 of axle 100 high-speed rotation, but the suction of drawing magnetism 300 has stoped upwards rising of it.
In addition, because the rotation of rotor 40, the rotating disk 50 that is placed on the upper end of rotor 40 also rotates thereupon, and be placed in disc (D) on the rotating disk 50 also with rotating disk 50 high-speed rotation, therefore, there is not the disk player that shows can be among the figure at short notice at disc (D) identifying recording layer, or the data of reproducing recorded.
Certainly, because the clip 54 of rotating disk 50 firmly fixes disc (D), so even it is with very high speed rotation, can upwards not rise or break away from rotating disk 50 yet, in addition, because the dish folder that does not have among the figure to show is pushed down disc (D) from above, it can upwards not rise or break away from yet.
Simultaneously, change the structure of the rotor 400 that is placed on stator 200 tops, can further reduce the whole height of Spindle Motor by the method that will be described below.
Fig. 3 is the skeleton view that is used for the rotor that Spindle Motor adopted of driving disk in the second embodiment of the present invention, and Fig. 4 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the second embodiment of the present invention.In the following description, identical sequence number is used for representing and above-mentioned first embodiment of the present invention components identical, and will omit the description to existing structure and operation in first embodiment.
With reference to figure 3 and Fig. 4, the structure of the Spindle Motor that is used for driving disk in the second embodiment of the present invention comprises: axle 100; Be placed on the stator 200 of the lower end of axle 100; Be contained in the drawing magnetism in the shell 500 of stator 200; And the rotating disk 50 that is used to place disc (D), the same among first embodiment of Spindle Motor and the invention described above, their structural unique differences are, at the inside surface of rotor 400 magnet 45 are arranged.
More particularly, this rotor 400 comprises in the mode that is press-fitted and is pressed into and is fixed on the fixing wheel hub 420 of axle 100 inside surfaces; Come out from wheel hub 420 horizontal-extendings, and the grooved rail 410 that forms with different height of tool; And from the grooved rail 410 downward right cylinders 430 that extend.Here, axle 100 is pressed into and is fixed in the wheel hub 420, and therefore axle 100 and rotor 400 are combined into one.
Grooved rail 410 has and produces by annealing process, a plurality of horizontal components 412,414 and 416 with ladder difference, horizontal component 412,414 and 416 is a staircase structure upwards, they are along the direction outwardly of the axle 100 that inserts wheel hub 420, and promptly cylindrical 430 direction towards the outside that is positioned at grooved rail 410 progressively promotes.
Simultaneously, horizontal component 412,414 and 416 is by close axle 100, and the first highly minimum horizontal component 412, be positioned at the outside of first 412, and, and, the difference of ladder forms owing to comparing second horizontal component, 414 the 3rd high horizontal components 416 owing to the difference of ladder compares second high horizontal component 414 of first horizontal component 412 and the outside that is positioned at second portion 414.
That is to say that first horizontal component 412 is adjacent to axle 100 and forms, the 3rd horizontal component 416 is adjacent to cylindrical 430 1 sides and forms, and second horizontal component 414 is formed between first horizontal component 412 and the 3rd horizontal component 416.
The lower end of the lower end of the sleeve pipe 52a of rotating disk 50, dish card 52 and dish seat 56 correspondingly be placed on successively these first, second and the 3rd horizontal component 412,414 and 416 on.
Certainly, in order to allow these elements of rotating disk 50 be placed on first, second and the 3rd horizontal component 412,414 and 416, the lower end of the rotating disk 50 of formation should be corresponding with horizontal component 412,414 and 416.
In other words, as shown in Figure 4, the thickness of the lower end 52b of dish card 52 should approach, so that the amount identical with the degree of depth of first horizontal component 412 can be given prominence in the lower end of sleeve pipe 52a, the dish seat 56 ratio lower end 52b height that should form are so that dish seat 56 is corresponding with the height of the 3rd horizontal component 416.
Certainly, can form and coil the packing ring shape that card 52 separates at dish seat 56, in this case, no matter the structure of the lower end of rotating disk 50 how, dish 56 can touch the 3rd horizontal component 416.
Simultaneously, before placing sleeve pipe 52a, bonding agent (B) is coated onto the upper end of first horizontal component 412 of the sleeve pipe 52a of holding tray card 52, so sleeve pipe 52a can be adhesively fixed on first horizontal component 412.
That is to say that rotating disk 50 is adhesively fixed on rotor 400 by the bonding agent on the lower surface that is coated in sleeve pipe 52a (B), and be combined into one, and axle 10 is press fitted in the internal diameter of sleeve pipe 52a with rotor 400.
But although explanation in the drawings, different with top description is, the degree of depth of first horizontal component can with the consistency of thickness of bonding agent (B), in this case, the lower end of sleeve pipe 52a can not highlight.
More particularly, first horizontal component 412 is worked into the suitable degree of depth, and with bonding agent (B) that the degree of depth filling of being processed is full, then sleeve pipe 52a is positioned on the bonding agent (B).In this state, after bonding agent (B) solidified, sleeve pipe 52a just was adhesively fixed on first horizontal component 412 by the part that contacts with bonding agent (B).
In the second embodiment of the present invention with said structure, rotating disk 50 is bonded on the rotor 400, so that rotating disk is fixed on the rotor more firmly, and owing to bonding agent (B) is coated on the upper surface of first horizontal component 412 equably, thereby the situation that bonding agent (B) flocks together can not take place.
Therefore, rotating disk 50 just can thereby not float owing to the former of bonding agent (B), thereby reduced the whole height (H3) of Spindle Motor, and, because bonding agent (B) is bonding with the whole lower surface of sleeve pipe 52a, so can guarantee that the bigger adhesive surface of rotor 400 and rotating disk 50 is long-pending, the bounding force of rotating disk 50 has also increased simultaneously.
Equally, the lower end 52b of dish card 52 is placed on second horizontal component 414 of rotor 400, so rotating disk 50 is the placements of sinking, its degree of depth and second horizontal component the degree of depth identical, can further reduce the whole height H3 of Spindle Motor like this.
Certainly, owing to be staircase structure, so just can keep a fixing gap (g) between rotor 400 and stator 200, this has reduced the whole height H3 of Spindle Motor.
Consequently, the whole height H3 of the Spindle Motor in the second embodiment of the present invention can be minimized, and is same, adopts the height of the disk player of this Spindle Motor also to reduce, and so just may produce the flat type disk player of compact dimensions.
Simultaneously, the grooved rail 410 of rotor 400 can be formed by two horizontal components.Fig. 5 be adopt this rotor 400 ' the third embodiment of the present invention in be used for the side cross-sectional, view of the Spindle Motor of driving disk.In description, identical sequence number is used for representing and above-mentioned second embodiment of the present invention components identical, and will omits the description of existing structure and operation in a second embodiment.
With reference to figure 5, the structure of the Spindle Motor that is used for driving disk in the third embodiment of the present invention comprises: axle 100; Be placed on the stator 200 of the lower end of axle 100; Be contained in the drawing magnetism in the shell 500 of stator 200; And the rotating disk 50 that is used to place disc (D), the same among second embodiment of Spindle Motor and the invention described above, their structural unique differences are, rotor 400 ' grooved rail 410 ' inside surface a magnet 45 is arranged.
Grooved rail 410 ' have produces by annealing process, have two horizontal components 412 of ladder difference ' and 414 ', horizontal component 412 ' and 414 ' be staircase structure upwards, these horizontal components along insert wheel hub 420 ' the direction outwardly of axle 100, promptly towards be positioned at grooved rail 410 ' the outside cylindrical 430 ' direction progressively promote.
At this moment, horizontal component 412 ' and 414 ' by near axle 100, and the first highly minimum horizontal component 412 ', be positioned at first 412 ' the outside and owing to the difference of ladder compares first horizontal component 412 ' high second horizontal component 414 ' composition.
That is to say first horizontal component 412 ' be adjacent to axle 100 to form second horizontal component 414 ' come out from first horizontal component 412 ' expansion.
The lower end of the lower end of the sleeve pipe 52a of rotating disk 50, dish card 52 and dish seat 56 be placed on separately these first and second horizontal components 412 ' and 414 ' on.
Certainly, for can allow these elements of rotating disk 50 be placed on first and second horizontal components 412 ' and 414 ' on, the lower end of rotating disk 50 should form and horizontal component 412 ' and 414 ' corresponding.
In other words, as shown in Figure 5, the lower end of the sleeve pipe 52a of dish card 52 can give prominence to first horizontal component 412 ' the identical amount of the degree of depth, the lower end 52b of dish card 52 and dish seat 56 should be than the lower end height of sleeve pipe 52a, thus with second horizontal component 414 ' height corresponding.
That is to say that the lower end 52b of dish card 52 and dish seat 56 are formed from the outstanding flanged structure in the below of dish card 52 downwards, sleeve pipe 52a is outwards outstanding from the below of flange.
Certainly, dish seat 56 can form and coil the packing ring shape that card 52 separates, in this case, no matter the structure of the lower end of rotating disk 50 is how, dish 56 can touch second horizontal component 414 '.
Simultaneously, before placing sleeve pipe 52a, bonding agent (B ') is coated onto first horizontal component 412 of the sleeve pipe 52a of holding tray card 52 ' the upper end, so sleeve pipe 52a can be adhesively fixed first horizontal component 412 ' on.
Yet although explanation in the drawings, different with top description is, first horizontal component 412 ' the degree of depth can with the consistency of thickness of bonding agent (B '), in this case, the lower end of sleeve pipe 52a can not highlight.
More particularly,, and with bonding agent (B ') degree of depth of being processed is filled fullly, then sleeve pipe 52a is positioned on the bonding agent (B ') the suitable degree of depth of first horizontal component 412 ' be worked into.In this state, after bonding agent (B ') solidifies, sleeve pipe 52a just by the part that contacts with bonding agent (B ') be adhesively fixed first horizontal component 412 ' on.
According to the third embodiment of the present invention with said structure, not only rotating disk 50 be securely fixed in rotor 400 ' on, and since bonding agent (B ') be coated in equably first horizontal component 412 ' upper surface on, therefore the situation that bonding agent (B ') flocks together can not take place.
Therefore, rotating disk 50 just can thereby not float owing to the former of bonding agent (B '), thereby reduced the whole height H3 ' of Spindle Motor, and, because bonding agent (B ') is bonding with the whole lower surface of sleeve pipe 52a, so can guarantee that rotor 400 ' and the bigger adhesive surface of rotating disk 50 is long-pending, the bounding force of rotating disk 50 has also increased simultaneously.
Certainly owing to be staircase structure, so just can rotor 400 ' and stator 200 ' between a maintenance fixing gap (g), this has reduced the whole height H3 ' of Spindle Motor.
Consequently, the whole height H3 ' of the Spindle Motor in the third embodiment of the present invention can be minimized, and is same, adopts the height of the disk player of this Spindle Motor also to reduce, and so just may produce the flat type disk player of compact dimensions.
Simultaneously, Fig. 6 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the fourth embodiment of the present invention.Structure and as shown in Figure 4 the second embodiment of the present invention the same that is used for the Spindle Motor of driving disk in the fourth embodiment of the present invention, the fixator 246 that their structural unique differences are stators 215 and the structure of iron core 284.
Therefore, in description, identical sequence number is used for representing and above-mentioned second embodiment of the present invention components identical, and will omits the description of existing structure and operation in a second embodiment.
With reference to figure 6, the shell 500 with grooving 520 that part cuts is in the upper end of iron core 284, and drawing magnetism 300 is contained in the shell 500, gives prominence to height on iron core 284 thereby can reduce drawing magnetism.
At this moment, the vertical height of fixator 246 can reduce the identical amount that height reduced with the drawing magnetism 300 that has highly reduced, and the vertical height of metal bearing 220 and axle 100 also can reduce, therefore the whole height H3 of Spindle Motor also can reduce, and, between the lower end of stator 215 and rotor 400, maintain (g) at interval as the situation in first embodiment of the invention to the three embodiment.
Certainly, the structure of shell 500 can be as shown in Figure 7.Fig. 7 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the fifth embodiment of the present invention.Be used for structure and the first embodiment of the present invention to the four embodiment the same of the Spindle Motor of driving disk in the fifth embodiment of the present invention, the position that their structural unique differences are shells 500 is in the upper end of the iron core 282 of fixator 244.
That is to say, grooving 520 ' the be arranged in upper end of the iron core 282 of stator 216, corresponding to the grooving 520 of iron core 282 ' another grooving 522 be positioned at the upper end of fixator 244, therefore constituted the shell 500 that holds drawing magnetism 300.
Drawing magnetism 300 is placed in the upper end of stator 216 with sinking, does not protrude in the top of stator 216, so the whole height H3 of Spindle Motor can reduce, and keeps gap (g) between the lower end of stator 216 and rotor 400.
Simultaneously, Fig. 8 is the side cross-sectional, view that is used for the Spindle Motor of driving disk in the sixth embodiment of the present invention.Structure and previous embodiment of the present invention the same that is used for the Spindle Motor of driving disk in the sixth embodiment of the present invention, their unique differences be have grooving 522 ' shell 500 be positioned at the upper end of fixator 242 and the structure of drawing magnetism 310.
More particularly, the drawing magnetism 310 that has changed structure has export-oriented flange 312 in the top, and therefore as shown in Figure 8, its volume has increased.
At this moment, the same with aforesaid embodiment, drawing magnetism 300 be inserted into the grooving 522 of shell 500 ', and the lower end of outside flange 312 is placed on the upper end of iron core 280.
Therefore, drawing magnetism 310 can be placed in the stator 218 with sinking, and the whole height H3 of Spindle Motor can reduce, and between stator 218 and rotor 400, keep gap (g), in addition, the volume of drawing magnetism 310 can obtain increasing, and its magnetic force has also just been strengthened, and the suction that therefore draws rotor 400 has increased too.
According to the Spindle Motor that is used for driving disk among the previously described first embodiment of the present invention to the six embodiment, ground placement drawing magnetism 300,310 can sink by the upper end at stator 200,215,216,218, reduce and constitute stator 200, comprise the vertical height of the element of axle 100, so just reduced whole height H2, the H3 of Spindle Motor.
Equally, in the Spindle Motor of the present invention, by use the rotor 400,400 that xsect has staircase structure ', rotating disk 50 can be placed on with sinking rotor 400,400 ' on, thereby further reduced whole height H3, the H3 ' of Spindle Motor.
Therefore, do not have the height of the disk player of demonstration can reduce the identical amount of height that reduces with Spindle Motor among the figure, thereby can produce the disk player of flat type.
In addition, bonding agent is coated in rotor 400,400 ' the upper end after bonding rotating disk 50, therefore enlarged the bond area of rotating disk 50, and strengthened bounding force.Equally, drawing magnetism 310 has outside flange, thereby has increased the volume of magnet, and the magnetic force that causes being produced has also been strengthened.
Aforesaid embodiment and advantage only illustrate, rather than in order to limit the invention.The description of this invention is in order to illustrate, rather than will limit the scope of claim.Those skilled in the art are to be understood that multiple alternatives, modifications and variations of the present invention.In the claims, the meaning sentence that adds function is used for by the recitation function, structure is identical and equivalent constructions, covers structure as described herein.
Although the present invention shows with reference to these preferred embodiments and describes, those those skilled in the art are to be understood that, in not deviating from as additional claims under the situation of defined scope and spirit of the present invention, it also is possible that its form and details are carried out various changes.
Has the Spindle Motor that is used for driving disk among the present invention of said structure and operation, has the stator of forming by the element that has effectively reduced height in the upper end that drawing magnetism is placed on stator with sinking, because rotor has been placed the identical amount of height that is reduced with drawing magnetism downwards, so the whole height of Spindle Motor has also reduced.
Equally, because rotor comprises the grooved rail with certain depth, so rotating disk can place the amount identical with the degree of depth of grooved rail downwards, thereby can further reduce the whole height of Spindle Motor.Consequently, adopt the height of the disk player of this Spindle Motor also can reduce, thereby can produce the disk player of flat type.
Equally, after bonding agent being coated on the grooved rail with certain depth, place rotating disk, therefore enlarged the bond area of rotating disk, and rotating disk can be bonded on the rotor securely.In addition, the upper end of drawing magnetism has outside flange, thereby has increased the volume of magnet, and the magnetic force that causes being produced has also correspondingly been strengthened.

Claims (18)

1. Spindle Motor that uses in disk player comprises:
Cover plate:
Be positioned at the rotating axle on the cover plate;
The shape for hat rotor is connected to the outside surface of the upper end of axle, and is placed with magnet on the surface within it;
Drawing magnetism is positioned at the below of rotor, is used to produce suction, to draw rotor downwards;
Stator, comprise below the rotor and be placed on metal bearing on the outside surface of axle, at the fixator of the outside surface of metal bearing with in the face of the magnet of rotor and between them, leave the iron core that is twining coil of air gap, wherein be useful on the shell that holds described drawing magnetism in the upper end of stator; With
Rotating disk comprises on the upper surface that is positioned at rotor, is used for placed in the middle and places the dish card of disc and be installed in coiling on the card, is used for fixing disc, to prevent to be placed on the clip that the disc on the dish card breaks away from.
2. Spindle Motor as claimed in claim 1, its mesochite comprises grooving, so that the part of the upper end of fixator is cut open.
3. Spindle Motor as claimed in claim 2, wherein the upper end of the ratio iron core of grooving formation is dark.
4. Spindle Motor as claimed in claim 3, wherein drawing magnetism has export-oriented flange in the top, and export-oriented flange is positioned over the upper end of described iron core.
5. Spindle Motor as claimed in claim 1, its mesochite comprises grooving, so that the part of the upper end of fixator is cut open.
6. Spindle Motor as claimed in claim 1, its mesochite comprises grooving, so that the part of the upper end of fixator and iron core is cut open.
7. Spindle Motor that uses in disk player comprises:
Cover plate:
Be positioned at the rotating axle on the cover plate;
The shape for hat rotor is connected to the outside surface of upper end of axle, has the grooved rail that forms with different height above it, and is placed with magnet on the surface within it;
Drawing magnetism is positioned at the below of rotor, is used to produce suction, to draw rotor downwards;
Stator, comprise the below that is positioned at rotor, and be placed on metal bearing on the outside surface of axle, be positioned at metal bearing outside surface fixator and in the face of the magnet of rotor, and between them, leave the iron core that is twining coil of air gap, wherein be useful on the shell that holds drawing magnetism in the upper end of stator; With
Rotating disk comprises on the upper surface that is positioned at rotor, is used for dish card placed in the middle and the placement disc, be installed on the dish card, be used for fixing disc, the dish seat of the disc that the clip that breaks away from the disc that prevents to be placed on the described dish card and being used for is placed from the supported underneath of rotating disk.
8. Spindle Motor as claimed in claim 7, wherein grooved rail comprises a plurality of horizontal components that form by the ladder difference.
9. Spindle Motor as claimed in claim 8, wherein said horizontal component have staircase structure upwards, and therefore on direction outwardly, the height that the described axle of its aspect ratio is connected to described rotor place progressively improves.
10. Spindle Motor as claimed in claim 9, wherein said horizontal component comprise two parts.
11. Spindle Motor as claimed in claim 10, wherein horizontal component comprises first horizontal component, and the lower end of the core of dish card is adhesively fixed thereon; With second horizontal component, the lower end and the dish seat of dish card are placed thereon.
12. Spindle Motor as claimed in claim 9, wherein horizontal component comprises three parts.
13. Spindle Motor as claimed in claim 12, wherein horizontal component comprises first horizontal component, and the lower end of the core of dish card is adhesively fixed thereon; Second horizontal component, the lower end of dish card is placed thereon; With the 3rd horizontal component, the dish seat is placed thereon.
14. as the described Spindle Motor of one of claim 7 to 13, its mesochite comprises grooving, so that cut the part of the upper end of fixator.
15. Spindle Motor as claimed in claim 14, wherein the upper end of the ratio iron core of grooving formation is dark.
16. Spindle Motor as claimed in claim 15, wherein drawing magnetism has export-oriented flange in the top, and export-oriented flange is positioned over the upper end of iron core.
17. as the described Spindle Motor of one of claim 7 to 13, its mesochite comprises grooving, so that cut the part of the upper end of iron core.
18. as the described Spindle Motor of one of claim 7 to 13, its mesochite comprises grooving, so that cut the part of the upper end of iron core.
CNA031106595A 2002-12-12 2003-04-18 Manishaft motor for driving aptical disk Pending CN1506960A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR79067/2002 2002-12-12
KR10-2002-0079067A KR100474139B1 (en) 2002-12-12 2002-12-12 Spindle motor for optical disk driver

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CN1506960A true CN1506960A (en) 2004-06-23

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JP (1) JP2004194493A (en)
KR (1) KR100474139B1 (en)
CN (1) CN1506960A (en)

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Publication number Priority date Publication date Assignee Title
CN101820199B (en) * 2006-06-20 2012-07-18 日本电产株式会社 Brushless motor having chucking mechanism, and disk driving device having the brushless motor

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JP2007058905A (en) * 2005-08-22 2007-03-08 Funai Electric Co Ltd Optical disk device
JP2009100540A (en) 2007-10-16 2009-05-07 Nippon Densan Corp Motor equipped with chucking device and disk drive unit mounted with the motor
KR101188073B1 (en) 2011-04-04 2012-10-05 삼성전기주식회사 Spindle motor

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JPH09149586A (en) * 1995-11-20 1997-06-06 Victor Co Of Japan Ltd Spindle motor
JPH09312058A (en) * 1996-05-23 1997-12-02 Mitsumi Electric Co Ltd Spindle motor for flexible disk drive and its balance adjusting method
KR100229682B1 (en) * 1996-11-22 1999-11-15 구자홍 Permanent magnetic rotating machine
KR100266739B1 (en) * 1997-08-22 2000-09-15 이형도 Spindle motor for digital video disk
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US6366427B1 (en) * 1999-04-21 2002-04-02 Seagate Technology Llc Single disc clamp nut for disc clamping in a disc drive
JP3762860B2 (en) * 2000-09-29 2006-04-05 日本電産サンキョー株式会社 motor
KR100396396B1 (en) * 2000-11-21 2003-09-02 엘지이노텍 주식회사 Spindle motor for driving optical disk

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101820199B (en) * 2006-06-20 2012-07-18 日本电产株式会社 Brushless motor having chucking mechanism, and disk driving device having the brushless motor

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KR100474139B1 (en) 2005-03-10
US20040114497A1 (en) 2004-06-17
KR20040051187A (en) 2004-06-18

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